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发明名称
Punch card device having a fine grain cellulose sponge backing member
摘要
申请公布号
US3060782(A)
申请公布日期
1962.10.30
申请号
US19590837479
申请日期
1959.09.01
申请人
BURGESS CELLULOSE COMPANY
发明人
BURGESS JACKSON
分类号
G06K1/06
主分类号
G06K1/06
代理机构
代理人
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地址
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